SQL Server stored procedures and commands
     The items in this section can be used to return information related
      to performance. 
  
    Note: This topic applies only to on-premises
      environments.
    - sp_who and sp_who2 - The stored procedure sp_who shows what SPID is blocked. sp_who2 shows who is blocking.
 - sp_helpindex (table_name) - Gives index information on a table.
 - DBCC OPENTRAN - Determines whether an open transaction exists within the log.
 - DBCC INPUTBUFFER (SPID) - Displays the last statement sent from a client to SQL Server.
 - DBCC Trace On - Enables specified trace flags.